babel/CHANGELOG.md

Changelog

Tags:

• [New Feature]
• [Bug Fix]
• [Spec Compliancy]
• [Breaking Change]
• [Documentation]

Note: Gaps between patch versions are faulty/broken releases.

2.5.0

• Remove noDuplicateProperties transformer.
• Better generated UIDs based on nodes.
• Default parameters now use arguments[i], conditionals and variable declarations instead of using long-form if statements.

2.4.10

• Upgrade acorn-6to5.

2.4.9

• Upgrade acorn-6to5.
• Add optional protoToAssign transformer.
• Fix missing properties from computed property keys.
• Make ES7 comprehensions let variables.

2.4.8

• Make require("6to5/register") work with browserify - #370. Thanks @hughsk!

2.4.7

• Upgrade acorn-6to5.

2.4.6

• Move coreAliasing and undefinedToVoid transformers down to catch moduleFormatter transforms.

2.4.5

• Avoid printing comments if they've already been output.

2.4.4

• Add module type to browser build <script> handler.
• Fix some MemberExpression modifying incorrectly setting property to a MemberExpression.

2.4.3

• Upgrade acorn-6to5.
• Add support for FunctionDeclarations in bluebirdCoroutines and asyncToGenerators transformers.

2.4.2

• Upgrade acorn-6to5.
• Better uids generated for various transformers based on parent node.
• Alias flat references in coreAliasing transformer.

2.4.1

• Better whitespace handling of parenthesized expressions due to trailing comments.
• Fix yield inside of comprehensions.

2.4.0

• Use a closure always for classes with a super.
• Always use native loops for array comprehensions.
• Allow yield inside of comprehensions.
• Add optional bluebirdCoroutine transformer.
• Add optional asyncToGenerator transformer.
• Move useStrict transformer to before _moduleFormatter causing "use strict"; to always be placed the very top.

2.3.2

• Add parens on expressions with trailing comments.

2.3.1

• Add undefinedToVoid optional transformer.
• Use Object.defineProperty for computed properties.

2.3.0

• Upgrade acorn-6to5.
• Support circular references and hoist variable declarations in system module formatter.
• Add optional transformers, including a new coreAliasing transformer that aliases native ES6 static properties to their core-js equivalent.

2.2.0

• Make system module formatter modules anonymous by default.
• Fix duplicate comments being output, breaking code.

2.1.0

• Add cache option to register hook.
• Update core-js.
• Fix starting newline not being added on case statements.
• Fix destructuring VariableDeclarations not inside BlockStatements and Program.

2.0.4

• Avoid being greedy when destructuring array iterables.

2.0.3

• Hoist function declarations in system module formatter for circular references.
• Hoist default function declarations in umd and amd module formatters for circular references.

2.0.2

• Inherit comments in for-of transformer.
• Remove interopRequire from system module formatter.

2.0.1

• Remap UpdateExpression module export binding.
• Fix automatic closure on PrivateDeclaration in classes.

2.0.0

• Make string literal generation only escapes unicode that it has to.
• Internal code generation format options have been exposed.
• Change playground method binding operator from : to # removing ambiguous syntax with terns.
• Fix rest parameters in async and generator functions.
• Export/import declarations replace by the modules transformer now inherit comments.
• Added playground flag to 6to5-node.
• 6to5-node now behaves the same as node.
• 6to5-node now uses kexec to become the forked process to correctly propagate signals on unix.
• Constants are now block scoped.
• Exposed ast transformer.
• Merged commonInterop and common module formatters.
• Fix generator comprehensions not inheriting arguments, this etc.
• Object and class mutator shorthand are now enumerable.
• Remove regenerator Generator has already finished error which isn't spec-compliant.
• Expose internal spec transformers that nicen up code output.
• Add export variable declaration default initializers.
• Propagate export declaration reassignments.
• Add initializer default to block scoped variable declarations within a loop.
• Flow type support.
• Make async/await contextual keywords.
• Allow yielding of non-objects.
• Class declarations now lack an IIFE.
• Support falsy and null super classes.
• Add support for experimental abstract references private declarations.
• Leave out IIFE for class declarations.
• Switched to core-js from es6-symbol and es6-shim for built-in polyfill.
• amd and umd module formatters now behave the same as common with interopRequire.
• Micro-optimizations to boost performance by 200%.
• Rename module formatter methods import to importDeclaration and export to exportDeclaration.
• Support multiple declarators in export variable declarations.
• Freeze tagged template literal object.
• Remove inlined regenerator fork.
• Remove ParenthesizedExpression.
• Rename object-spread helper to object-without-properties.
• Rename class-props helper to prototype-properties.
• Rename extends helper to inherits.
• Completely rewritten system module formatter.

1.15.0

• Don't alias GeneratorFunction and check the name which causes minifiers to remove the name and throw an error later on when we check if it's set.

1.14.18

• Fix files only containg comments not being output.
• Fix duplicate comments on property key shorthands.

1.14.17

• Add default initializer to let variables within loop bodies.
• Fix excessive break replacement inside of switches in let scoping.

1.14.16

• Add object getter memos and this shorthand to playground.
• Fix while loops in let scoping.
• Upgrade acorn-6to5.

1.14.14

• Fix template literals escaping.

1.14.13

• Fix let scoping of while loops.
• Make class methods enumerable.

1.14.12

• Fix duplicate dynamic expressions in call spread.

1.14.10

• Fix let scoping unneccesary override.

1.14.6

• Avoid ensuring a block on non-array node replacements.

1.14.5

• Upgrade acorn-6to5.
• Fix JSON recursion error for unknown code generator node types.
• Ensure that a statement is a block on block/statement types when replacing them with multiple nodes.

1.14.4

• Merge pretzel maps and method binding.

1.14.3

• Add playground pretzel maps.

1.14.2

• Fix commonInterop default export handling.
• Fix keyworded property key identifiers being turned into computed property key literals.

1.14.1

• Inherit comments from ClassDeclaration.

1.14.0

• Add playground.

1.13.13

• Fix --debug in bin/6to5-node. Thanks @timoxley.

1.13.12

• Ignore XJSEmptyExpressions in react transformer output.

1.13.11

• Fix util.regexify on falsy values.
• Fix _aliasFunction with rest parameters.
• Export as module.exports instead of exports.default if there are no other ExportDeclarations in commonInterop module formatter.
• Add system module formatter. Thanks @douglasduteil.

1.13.10

• Add support for AssignmentExpression destructuring outside of ExpressionStatement.

1.13.9

• Fix VirtualPropertyExpression visitor keys.

1.13.8

• Only use a single reference in abstract references.

1.13.7

• Upgrade acorn-6to5.
• Add experimental exponentiation operator support.

1.13.6

• Fix experimental object spread/rest helper.

1.13.5

• Upgrade acorn-6to5.
• Add experimental support for object spread/rest.
• Change arguments to array to an additional helper method.

1.13.4

• Fix single spread element returning itself.

1.13.3

• Upgrade acorn-6to5.
• Add experimental support for abstract references.

1.13.2

• Optimise Array.from usage by adding a helper method.
• Upgrade acorn-6to5.

1.13.1

• Fix constructor spread optimisation. Thanks @zloirock.

1.13.0

• Put experimental ES7 features behind a flag --experimental and experimental option.
• Constructor spread performance increase. Thanks @RReverser.
• Use self instead of window in the optional 6to5 runtime. Thanks @RReverser.

1.12.26

• Support computed property destructuring.

1.12.25

• Update acorn-6to5, ast-types, es6-shim, chokidar, estraverse and private.

1.12.24

• Collect references that haven't been declared in scope.

1.12.23

• Fix generator function export hoisting.

1.12.22

• Update fs-readdir-recursive and chokidar.
• Support array destructuring on iterables.
• Make amd module id optional. Thanks @webpro.

1.12.21

• Fix unneccesary let scoping replacement.
• Add commonInterop module formatter. Thanks @Naddiseo.
• Fix return outside of function body bug. Thanks @brentburg.
• Add more flexible option types.

1.12.20

• Append sourceMappingURL when using bin/6to5 and output sourcemaps.

1.12.19

• Add comments option and --remove-comments flag. Thanks @webpro.
• Embed regenerator.

1.12.18

• Use global reference instead of window.

1.12.17

• Add moduleName, sourceRoot and filenameRelative options. Thanks @darvelo.
• Traversal optimisations.

1.12.16

• Fix comments not being retained from MethodDefinition in classes.
• Add temporal dead zone in default parameters.

1.12.15

• Update acorn-6to5.

1.12.14

• Fix duplicate let scoping in functions.
• Make JSX whitespace more React-compliant.
• Add _memberExpressionKeywords transformer that turns keyword identifiers to computed literals.
• Upgrade regenerator-6to5.

1.12.13

• Support duplicate constants within different block scopes.
• Fix for-head duplication testing and replacement.
• Support raw property on tagged template literals.

1.12.12

• Make scope tracker more reliable to handle all edgecases.

1.12.11

• Block scope classes.
• Fix generation of integer Literals in MemberExpression.

1.12.10

• Fix let scoping var hoisting.

1.12.9

• Escape unicode characters when generating string Literals.
• Fix semicolons being output for statements in ExportDeclaration.
• Fix WithStatement missing parenthesis.

1.12.8

• Temporarily forbid AssignmentExpression destructuring outside of ExpressionStatement.

1.12.7

• Update to latest acorn-6to5.

1.12.6

• Update to latest acorn-6to5.

1.12.5

• Fix excessive whitespace trimming resulting in innaccurate sourcemap line.

1.12.4

• Add doc folder for documentation.

1.12.3

• Support generator comprehensions.
• Use Array.from instead of Array.prototype.slice in spread transformer.
• Support spread in NewExpressions.

1.12.2

• Upgrade matcha to 0.6.0 and browserify to 6.3.2.
• Add own trimRight helper instead of relying on the string instance method.
• Support JSX spreads that aren't the first.

1.12.1

• Fix this and arguments mapping in the _aliasFunctions transformer.

1.12.0

• Combine jsx and react transformers to react.
• Update react syntax output to React v0.12.

1.11.15

• Fix JSX literal whitespace generation.

1.11.14

• Avoid using a switch for let-scoping continue and break statements and use an if statement instead.
• Remove excess whitespace and newlines from JSX literals.

1.11.13

• Update regenerator-6to5
• Add support for most escodegen formatting options